Nasal cannula



FIG. 1 is a rear elevational view of the nasal cannula, showing our new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a front and right side perspective view of the nasal cannula of FIG. 1.

The broken lines in the drawings depict portions of the nasal cannula that form no part of the claimed design. 

CLAIM The ornamental design for a nasal cannula, as shown and described. 